Plasma membrane is no barrier to free fatty acid
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The Cell Membrane – Anatomy & Physiology
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Membrane thickness, lipid phase and sterol type are determining factors in the permeability of membranes to small solutes | Nature Communications
Passive transport - Wikipedia
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The Cell Membrane – Anatomy & Physiology
Passive transport across cell membranes
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Simple Diffusion - Definition and Examples - Biology Online Dictionary
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Cell membrane - Wikipedia
Transport Across Cell Membrane (Biology): Explanation, Types
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3.1 The Cell Membrane – Anatomy & Physiology
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Lipid Bilayer Permeability - PhysiologyWeb
